Examine source code of Share Garmin Workout

{
  "name": "Share your Garmin Connect workout",
  "version": "0.1.1",
  "description": "Share your personal workout on Garmin Connect with other users",
  "author": "Lucas W",
  "default_locale": "en",
  "action": {
    "default_popup": "popup.html",
    "default_title": "About"
  },
  "content_scripts": [
    {
      "matches": [
        "https://connect.garmin.com/*",
        "https://connect.garmin.cn/*"
      ],
      "run_at": "document_idle",
      "js": [
        "share-your-workout.js"
      ]
    }
  ],
  "permissions": [],
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "lwitvoet.pro@proton.me",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}